Last, and potentially more profitable for the weight loss industry, are devices, supplements and other products intended to produce weight loss. These include diet pills, natural weight loss supplements containing acai, African mango and a range of other substances, plus belts and other devices. The basic principle behind some of these products has been shown to help with reduction when it's combined with other mainstream methods, but the majority of diet pills and other products don't do much to help. They can even be harmful to your health.